Revolution-register



(No Model.)

G. G. WEITZ. REVOLUTION REGISTER.

No. 470,526. Patented Mar. 8, 1892.

IVE ,4, 4%a.

UNITED STATES PATENT OFFICE.

GEORGE G. WEITZ, OF \lEDFORD, HASSAOI'IUSETTS.

REVOLUTION-REGISTER.

SPECIFICATION forming part of Letters Patent No. 470,526, dated March 8, 1892.

Application filed September 26,1891. Serial No. 406,898. (No model.)

Figure 1 represents a top plan view of the invention. Fig. 2 represents a cross-section on the line X X, shown in Fi 1; and Fig. 3 represents a central longitudinal section on the line Y Y, shown in Fig. l.

The same letters refer to the same or similar parts wherever they occur on the different parts of the drawings.

A is the base-plate, as usual, having uprights or bearings A and i as shown in the drawings.

To the outside of the hearing A is preferably secured a sleeve A, in which is j ournaled the shaft 13, to which a rotary or reciprocating motion may be imparted by means of any well-known mechanism from the shaft or other mechanical device, the rotary or reciprocating speed of which it is desired to ascertain. The inner end of said shaft B has preferably secured to or made in one piece with it a head 13, to the end of which is secured in a suitable manner ahainmer-headed projection b, as shown in Figs. 2 and 3. 1 The said ha1nmer-headed projection works in an elongated slot 0 or cut-away portion in the movable block 0, which is setinto reciprocating motion by the action of the shaft 13 and its hammer-headed projection b,either by rotating or reciprocating such shaft and its projection.

The block 0 is guided in a suitable manner, and for this purpose I have shown in Fig. 2 0f the drawings said block as having slots 0 0, adapted to receive pins or projections G G secured to the standard A. For the purpose of preventing the block 0 from dropping Off from the standard A, I have shown in the drawings screws or pins a a, secured to the standard A, and. having their heads projecting in grooves c c on the top and bottom edges of the block 0. The said block may, however, be guided in any othersuitable manner without departing from the spirit of my invention.

' D is the registerdrum shaft, which is held stationary in any suitable manner. In the drawings I have shown said shaft secured in one end by means of a set'screw a to the hearing A and having its forward end resting in a circular disk at the end of the head B, as shown in Fig. 3. On the shaft D are loosely j ournaled side by side a series of drums or disks E, F, and G, of which E is the units drum, F the tens-dru m, and G the hundreds drum, and more may be added on said shaft D, according to the number of revolutions or reciprocations that are to be indicated. Each of said drums is marked on its periphery from 0 to 9, as is common in devices of this kind.

To the block 0 is secured a pair of outwardly-projecting teeth or wedges and 0 adapted to intermittently come in contact with and actuate a series of end projections or teeth E E on the units-disk E, as shown in Fig. 9. During the motion of the block 0 in the direction of the arrow shown upon it in Fig. 2, the wedge C" comes in contact with the upper portion of one of the projections E on the units-disk E and causes it to be depressed, and as the said block 0 is moved in the opposite direction its wedge 0 comes in contact with the under side of one of the proj ections E, causing it to be raised, and thus imparting an intermittent rotary motion (in the direction of the arrow shown in Fig. 2) to the units-disk E. The block 0 may be reciprocated either by the rotation or reciprocation of the shaft B and its projection b. Such reciprocation of the block 0 is accomplished by the projection 19 on the shaft B coming in contact with the walls of the elongated slot C in the block 0, either by rotating or oscillating the shaft B and its projection I).

II is a shaft or arbor secured in a suitable manner to the frame of the machine and upon it are loosely journaled the pinions I K, the teeth of which mesh, respectively, in teeth or trunnions on the units and tens drums, and tens and hundreds drums, as is common in devices of this kind, so as to impart a tenth of a revolution to the tens-drum for each complete revolution of the units-drum, and so on in the series of drums that are. used.

On the shaftD is adj ustably secured a collar D, for the purpose of retaining the disks E F G in their proper relative positions on the shaft D when the device is in use. Whenever it is desired to set the device at zero after a speed indication has been obtained, all that is necessary to do is to release the collar D from the shaft D and to slide the disksE F G sufficiently to allow them to be turned independent of each other and their piniofis. The disks are then turned to zero position and placed side by side in engagement with the pinions I K, after which the collar D" is 7 brought up against the hub of the last disk in the series and secured to the shaft D, as before. 1 I I I By having a hammer-headed projection b on the shaft B, as described, and by the an rangen e'nt of reciprocating inclines C adaptedtom ov'efrom the center toward the 'pe riphery of the units-d rum great accuracy and easy movement devoid of frictional resistance isobtained in the running and operation of the device. I

On using the indicator the shaftB is geared or otherwise coupled tor connected to the I Shaft, the speed of which is to be measured.

Having thus fully described the nature, construction, and operation of my invention, I wish to secure by Letters Patent and claim 1. The combination, in a revolution-indi oator, of a shaft having a hammer-headed projection, a sliding block havinga slotted recess adapted to receive the said projection and having outwardly projecting wedges adapted to act from the center outward on an indicator-drum having end projections thereon, substantially as and for the purpose set forth.

2. The combination, in a revolution-indicator, of a shaft having a hammer-headed projection, a sliding block havingaslotted recess adapted to receive said projection and having outwardly-projecting wedges adapted to act from the center outward on an inditwo subscribing witnesses, on this 25th day 'of'Septeinber, A. D. 1891. I I I GEORGE G. WEITZ.

Witnesses: I

ALBAN A DREN,

ALICE A. PERKINS. 

